Checking device for sliding doors.



No. 695,035. Patented Mar. H. I902.

W. H. COOK.

CHECKING DEVICE FCB SLIDING DOORS.

(Application filed May 21, 1901.) (No Model.)

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UNITED Srarns a'rn'r FFlCE.

\VILLIAM HENRY COOK, OF NEVV ARK, DELAWARE.

CHECKlNG DEVICE FOR SLIDING DOORS.

SPECIFICATION forming part of Letters Patent No. 695,035, dated March 11, 1902. Applicationfiled May 21, 1901. Serial No. 61,293. (No model.)

To all whom, it may concern:

Be it known that LWILLIAM HENRY COOK, a citizen of the United States, residing at Newark, in the county of Newcastle and State of Delaware, have invented certain new and useful Improvementsin Checking Devices for Sliding Doors,of which the following is a speci fication.

This invention. relates to checking devices for sliding doors; and it consists of a check designed to gradually arrest the movement of the door as it approaches either its opened or closed position.

The invention will be fully described hereinafter, reference being had to the accompanying drawings, in which Figure 1 is a sectional elevation showing a sliding door with my invention applied thereto. Fig. 2 is a View of part of the checking device detached.

A represents a sliding door supported by rollers (1, attached to its upper end, which rollers run upon a track I).

To a suitable support 10 are secured two or more bands or straps 11, which support a semicircular bolt 12, the forward end of which is provided with an elastic cushion, (indicated by 13,) against which the edge of the door will impinge after it has partly opened, andthe further movement of the door will move the bolt lengthwise through the straps 11. In order to regulate the frictional resistance between the bolt and the straps, one side of each strap is supported by a spring 14, surrounding the screw 15, which secures this side of the strap to the support 10, and obviously the pressure of the strap upon the bolt can be regulated by adjusting the screw 15 and increasing or diminishing the tension of the spring. The bands or straps 11 will preferably be provided with a lining 17, of hard rubber, vulcanized fiber, or similar material, to cause friction upon the bolt. The bolt is connected to a door by a cord or chain 16, and the bolt and cord will assume the positions indicated in dotted lines in Fig. 1 when the door is open. The bolt will act as a ch eck for the latter part of the movement of the door in either direction.

When two doors are to be operated, the mechanism described will be duplicated on the opposite side of the doorway.

Without limit-ing myself to the precise details of construction illustrated and described, I claim 1. The combination with a sliding door, of a checking device consisting of a bolt provided with an elastic cushion at one end and supported in the path of movement of the door in position to be struck thereby when the door has partially completed its opening movement, a strap surrounding said bolt, and means for varying the pressure of said strap upon the bolt, substantially as set forth.

, 2. The combination with a sliding door, of a checking device consisting of a bolt supported in the path of'movement of the door,-

and in position to be struck by the door when the latter has partially completed its opening movement, a flexible connection between the door and the bolt, and means for retarding the movement of the bolt, substantially as set forth.

3. The combination with a sliding door, of a checking device consisting of a bolt located in the path of movement of the door, bands or straps for supporting said bolt, a frictionlining between the bands and bolt, means to adjust the pressure of the said lining upon the bolt, and a flexible connection between the bolt and the door, substantially as set forth. In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM HENRY COOK. Witnesses:

WALTER O. DANIELS, FRANKLIN N. J ERVIS. 

